Dor-nu-Fauglith

"[Fingolfin] passed over Dor-nu-Fauglith like a wind amid the dust, and all that beheld his onset fled in amaze..."

Quenta Silmarillion 18Of the Ruin of Beleriand and Fall of Fingolfin

A name translated as 'Land under Choking Ash', apparently referring to the same region as the much more common name Anfauglith. This was the scorched desert land that lay between the northern fences of Beleriand and Morgoth's fortress of Angband, formed by the flames of the Dagor Bragollach. Before that ruinous Battle, it had been the wide green plain of Ard-galen, but after Morgoth unleashed his fires, nothing was left but an empty desert of ash and dust.